- IS-IS Overview and Basic Configuration
- Reducing Failure Detection Times in IS-IS Networks
- Enhancing Security in an IS-IS Network
- Configuring Integrated IS-IS Protocol Shutdown Support Maintaining Configuration Parameters
- IS-IS Support for Route Tags
- IS-IS Multiarea Support
- IS-IS Support for an IS-IS Instance per VRF for IP
- IPv6 Routing: IS-IS Multitopology Support for IPv6
- IPv6 Routing: IS-IS Support for IPv6
- IPv6 Routing: Route Redistribution
IPv6 Routing: Route Redistribution
IPv6 route redistribution supports redistributing routes into an IPv6 IS-IS routing process and redistributing IPv6 IS-IS routes between IS-IS levels.
- Finding Feature Information
- Information About IPv6 Routing: Route Redistribution
- How to Configure IPv6 Routing: Route Redistribution
- Configuration Examples for IPv6 Routing: Route Redistribution
- Additional References
- Feature Information for IPv6 Routing: Route Redistribution
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Information About IPv6 Routing: Route Redistribution
IS-IS Enhancements for IPv6
IS-IS in IPv6 functions the same and offers many of the same benefits as IS-IS in IPv4. IPv6 enhancements to IS-IS allow IS-IS to advertise IPv6 prefixes in addition to IPv4 and OSI routes. Extensions to the IS-IS command-line interface (CLI) allow configuration of IPv6-specific parameters. IPv6 IS-IS extends the address families supported by IS-IS to include IPv6, in addition to OSI and IPv4.
IS-IS in IPv6 supports either single-topology mode or multiple topology mode.
IPv6 IS-IS Route Redistribution
IS-IS for IPv6 supports redistributing routes into an IPv6 IS-IS routing process and redistributing IPv6 IS-IS routes between IS-IS levels.
How to Configure IPv6 Routing: Route Redistribution
- Redistributing Routes into an IPv6 IS-IS Routing Process
- Redistributing IPv6 IS-IS Routes Between IS-IS Levels
- Verifying IPv6 IS-IS Configuration and Operation
Redistributing Routes into an IPv6 IS-IS Routing Process
1.
enable
2.
configure terminal
3.
router isis
area-tag
4.
address-family ipv6 [unicast]
5.
redistribute
source-protocol [process-id] [metric
metric-value] [metric-type
type-value] [route-map
map-tag]
6.
end
DETAILED STEPS
Redistributing IPv6 IS-IS Routes Between IS-IS Levels
Perform this task to redistribute IPv6 routes learned at one IS-IS level into a different level.
1.
enable
2.
configure
terminal
3.
router
isis
area-tag
4.
address-family ipv6 [unicast]
5.
redistribute
isis
[process-id]
{level-1 |
level-2}
into {level-1 |
level-2}
distribute-list
list-name
6.
end
DETAILED STEPS
Verifying IPv6 IS-IS Configuration and Operation
1.
enable
2.
show
ipv6
protocols
[summary]
3.
show
isis
[process-tag] [ipv6 |
*]
topology
4.
show
clns
[process-tag]
neighbors
interface-type
interface-number] [area] [detail]
5.
show
clns
area-tag
is-neighbors
[type
number] [detail]
6.
show
isis
[process-tag]
database [level-1] [level-2] [l1] [l2] [detail] [lspid]
7.
show
isis
ipv6
rib
[ipv6-prefix]
DETAILED STEPS
Command or Action | Purpose | |
---|---|---|
Step 1 |
enable
Example: Device> enable |
Enables privileged EXEC mode. |
Step 2 |
show
ipv6
protocols
[summary]
Example: Device# show ipv6 protocols |
Displays the parameters and current state of the active IPv6 routing processes. |
Step 3 |
show
isis
[process-tag] [ipv6 |
*]
topology
Example: Device# show isis topology |
Displays a list of all connected routers running IS-IS in all areas. |
Step 4 |
show
clns
[process-tag]
neighbors
interface-type
interface-number] [area] [detail]
Example: Device# show clns neighbors detail |
Displays end system (ES), intermediate system (IS), and multitopology IS-IS (M-ISIS) neighbors. |
Step 5 |
show
clns
area-tag
is-neighbors
[type
number] [detail]
Example: Device# show clns is-neighbors detail |
Displays IS-IS adjacency information for IS-IS neighbors. |
Step 6 |
show
isis
[process-tag]
database [level-1] [level-2] [l1] [l2] [detail] [lspid]
Example: Device# show isis database detail |
Displays the IS-IS link-state database. |
Step 7 |
show
isis
ipv6
rib
[ipv6-prefix]
Example: Device# show isis ipv6 rib |
Displays the IPv6 local RIB. |
Configuration Examples for IPv6 Routing: Route Redistribution
- Example: Redistributing Routes into an IPv6 IS-IS Routing Process
- Example: Redistributing IPv6 IS-IS Routes Between IS-IS Levels
- Example: Configuring IS-IS for IPv6
Example: Redistributing Routes into an IPv6 IS-IS Routing Process
The following example redistributes IPv6 BGP routes into the IPv6 IS-IS Level 2 routing process:
router isis address-family ipv6 redistribute bgp 64500 metric 100 route-map isismap exit
Example: Redistributing IPv6 IS-IS Routes Between IS-IS Levels
The following example redistributes IPv6 IS-IS Level 1 routes into the IPv6 IS-IS Level 2 routing process:
router isis address-family ipv6 redistribute isis level-1 into level-2
Example: Configuring IS-IS for IPv6
In the following example, output information about the parameters and current state of that active IPv6 routing processes is displayed using the show ipv6 protocolscommand:
Device# show ipv6 protocols IPv6 Routing Protocol is "connected" IPv6 Routing Protocol is "static" IPv6 Routing Protocol is "isis" Interfaces: GigabitEthernet0/0/3 GigabitEthernet0/0/1 Serial1/0/1 Loopback1 (Passive) Loopback2 (Passive) Loopback3 (Passive) Loopback4 (Passive) Loopback5 (Passive) Redistribution: Redistributing protocol static at level 1 Address Summarization: L2: 2001:DB8:33::/16 advertised with metric 0 L2: 2001:DB8:44::/16 advertised with metric 20 L2: 2001:DB8:66::/16 advertised with metric 10 L2: 2001:DB8:77::/16 advertised with metric 10
In the following example, output information about all connected routers running IS-IS in all areas is displayed using the show isis topologycommand:
Device# show isis topology IS-IS paths to level-1 routers System Id Metric Next-Hop Interface SNPA 0000.0000.000C 0000.0000.000D 20 0000.0000.00AA Se1/0/1 *HDLC* 0000.0000.000F 10 0000.0000.000F GE0/0/1 0050.e2e5.d01d 0000.0000.00AA 10 0000.0000.00AA Se1/0/1 *HDLC* IS-IS paths to level-2 routers System Id Metric Next-Hop Interface SNPA 0000.0000.000A 10 0000.0000.000A GE0/0/3 0010.f68d.f063 0000.0000.000B 20 0000.0000.000A GE0/0/3 0010.f68d.f063 0000.0000.000C -- 0000.0000.000D 30 0000.0000.000A GE0/0/3 0010.f68d.f063 0000.0000.000E 30 0000.0000.000A GE0/0/3 0010.f68d.f063
In the following example, output information to confirm that the local router has formed all the necessary IS-IS adjacencies with other IS-IS neighbors is displayed using the show clns is-neighborscommand. To display the IPv6 link-local addresses of the neighbors, specify the detail keyword.
Device# show clns is-neighbors detail System Id Interface State Type Priority Circuit Id Format 0000.0000.00AA Se1/0/1 Up L1 0 00 Phase V Area Address(es): 49.0001 IPv6 Address(es): FE80::YYYY:D37C:C854:5 Uptime: 17:21:38 0000.0000.000F Et0/0/1 Up L1 64 0000.0000.000C.02 Phase V Area Address(es): 49.0001 IPv6 Address(es): FE80::XXXX:E2FF:FEE5:D01D Uptime: 17:21:41 0000.0000.000A Et0/0/3 Up L2 64 0000.0000.000C.01 Phase V Area Address(es): 49.000b IPv6 Address(es): FE80::ZZZZ:F6FF:FE8D:F063 Uptime: 17:22:06
In the following example, detailed output information that displays both end system (ES) and intermediate system (IS) neighbors is displayed using the show clns neighbors command with the detail keyword.
Device# show clns neighbors detail System Id Interface SNPA State Holdtime Type Protocol 0000.0000.0007 GE3/3 aa00.0400.6408 UP 26 L1 IS-IS Area Address(es): 20 IP Address(es): 172.16.0.42* Uptime: 00:21:49 0000.0C00.0C35 GE3/2 0000.0c00.0c36 Up 91 L1 IS-IS Area Address(es): 20 IP Address(es): 192.168.0.42* Uptime: 00:21:52 0800.2B16.24EA GE3/3 aa00.0400.2d05 Up 27 L1 M-ISIS Area Address(es): 20 IP Address(es): 192.168.0.42* IPv6 Address(es): FE80::2B0:8EFF:FE31:EC57 Uptime: 00:00:27 0800.2B14.060E GE3/2 aa00.0400.9205 Up 8 L1 IS-IS Area Address(es): 20 IP Address(es): 192.168.0.30* Uptime: 00:21:52
In the following example, detailed output information about LSPs received from other routers and the IPv6 prefixes they are advertising is displayed using the show isis databasecommand with the detail keyword specified:
Device# show isis database detail IS-IS Level-1 Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL 0000.0C00.0C35.00-00 0x0000000C 0x5696 325 0/0/0 Area Address: 47.0004.004D.0001 Area Address: 39.0001 Metric: 10 IS 0000.0C00.62E6.03 Metric: 0 ES 0000.0C00.0C35 --More-- 0000.0C00.40AF.00-00* 0x00000009 0x8452 608 1/0/0 Area Address: 47.0004.004D.0001 Topology: IPv4 (0x0) IPv6 (0x2) NLPID: 0xCC 0x8E IP Address: 172.16.21.49 Metric: 10 IS 0800.2B16.24EA.01 Metric: 10 IS 0000.0C00.62E6.03 Metric: 0 ES 0000.0C00.40AF IPv6 Address: 2001:DB8::/32 Metric: 10 IPv6 (MT-IPv6) 2001:DB8::/64 Metric: 5 IS-Extended cisco.03 Metric: 10 IS-Extended cisco1.03 Metric: 10 IS (MT-IPv6) cisco.03 IS-IS Level-2 Link State Database: LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL 0000.0000.000A.00-00 0x00000059 0x378A 949 0/0/0 Area Address: 49.000b NLPID: 0x8E IPv6 Address: 2001:DB8:1:1:1:1:1:1 Metric: 10 IPv6 2001:DB8:2:YYYY::/64 Metric: 10 IPv6 2001:DB8:3:YYYY::/64 Metric: 10 IPv6 2001:DB8:2:YYYY::/64 Metric: 10 IS-Extended 0000.0000.000A.01 Metric: 10 IS-Extended 0000.0000.000B.00 Metric: 10 IS-Extended 0000.0000.000C.01 Metric: 0 IPv6 11:1:YYYY:1:1:1:1:1/128 Metric: 0 IPv6 11:2:YYYY:1:1:1:1:1/128 Metric: 0 IPv6 11:3:YYYY:1:1:1:1:1/128 Metric: 0 IPv6 11:4:YYYY:1:1:1:1:1/128 Metric: 0 IPv6 11:5:YYYY:1:1:1:1:1/128 0000.0000.000A.01-00 0x00000050 0xB0AF 491 0/0/0 Metric: 0 IS-Extended 0000.0000.000A.00 Metric: 0 IS-Extended 0000.0000.000B.00
The following example shows output from the show isis ipv6 rib command. An asterisk (*) indicates prefixes that have been installed in the master IPv6 RIB as IS-IS routes. Following each prefix is a list of all paths in order of preference, with optimal paths listed first and suboptimal paths listed after optimal paths.
Device# show isis ipv6 rib IS-IS IPv6 process "", local RIB 2001:DB8:88:1::/64 via FE80::210:7BFF:FEC2:ACC9/GigabitEthernet2/0/0, type L2 metric 20 LSP [3/7] via FE80::210:7BFF:FEC2:ACCC/GigabitEthernet2/1/0, type L2 metric 20 LSP [3/7] * 2001:DB8:1357:1::/64 via FE80::202:7DFF:FE1A:9471/GigabitEthernet2/1/0, type L2 metric 10 LSP [4/9] * 2001:DB8:45A::/64 via FE80::210:7BFF:FEC2:ACC9/GigabitEthernet2/0/0, type L1 metric 20 LSP [C/6] via FE80::210:7BFF:FEC2:ACCC/GigabitEthernet2/1/0, type L1 metric 20 LSP [C/6] via FE80::210:7BFF:FEC2:ACC9/GigabitEthernet2/0/0, type L2 metric 20 LSP [3/7] via FE80::210:7BFF:FEC2:ACCC/GigabitEthernet2/1/0, type L2 metric 20 LSP [3/7]
Additional References
Related Documents
Related Topic |
Document Title |
---|---|
IS-IS commands: complete command syntax, command mode, defaults, command history, usage guidelines, and examples |
Cisco IOS IP Routing: ISIS Command Reference |
Overview of Cisco IS-IS conceptual information with links to all the individual IS-IS modules |
"Integrated IS-IS Routing Protocol Overview" module |
ISO CLNS commands |
Cisco IOS ISO CLNS Command Reference |
Command Lookup Tool |
http://tools.cisco.com/Support/CLILookup |
Standards
Standards |
Title |
---|---|
No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature. |
-- |
MIBs
MIBs |
MIBs Link |
---|---|
No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature. |
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: |
RFCs
RFCs |
Title |
---|---|
No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature. |
-- |
Technical Assistance
Description |
Link |
---|---|
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
Feature Information for IPv6 Routing: Route Redistribution
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to . An account on Cisco.com is not required.
Feature Name |
Releases |
Feature Information |
---|---|---|
IPv6 Routing: Route Redistribution |
Cisco IOS XE Release 3.5E Cisco IOS XE Release 3.6E |
IS-IS for IPv6 supports redistributing routes into an IPv6 IS-IS routing process and redistributing IPv6 IS-IS routes between IS-IS levels. In Cisco IOS XE Release 3.6E, this feature is supported on Cisco Catalyst 3850 Series Switches. The following commands were introduced or modified: address-family ipv6, redistribute isis (IPv6). |